package com.itheima.web.servlet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class BaseServlet extends HttpServlet {

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String requestURI = req.getRequestURI();

        int index = requestURI.lastIndexOf("/");

        String methodName = requestURI.substring((index + 1));

        /*System.out.println(methodName);
        System.out.println(this);*/

        Class<? extends BaseServlet> cls = this.getClass();

        Method method = null;
        try {
            method = cls.getMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
            method.invoke(this,req,resp);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }


    }
}
